/*
GanttProject is an opensource project management tool. License: GPL2
Copyright (C) 2011 GanttProject Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
package net.sourceforge.ganttproject.document;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;

/**
 * Document which proxies all read methods and forbids all write methods.
 *
 * @author dbarashev (Dmitry Barashev)
 */
public class ReadOnlyProxyDocument implements Document {

    private final Document myDelegate;

    public ReadOnlyProxyDocument(Document delegate) {
        myDelegate = delegate;
    }

    @Override
    public String getFileName() {
        return myDelegate.getFileName();
    }

    @Override
    public boolean canRead() {
        return myDelegate.canRead();
    }

    @Override
    public IStatus canWrite() {
        return new Status(IStatus.ERROR, "net.sourceforge.ganttproject", 0, "You can't write a read-only document", null);
    }

    @Override
    public boolean isValidForMRU() {
        return false;
    }

    @Override
    public boolean acquireLock() {
        return true;
    }

    @Override
    public void releaseLock() {
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return myDelegate.getInputStream();
    }

    @Override
    public OutputStream getOutputStream() throws IOException {
        return null;
    }

    @Override
    public String getPath() {
        return myDelegate.getPath();
    }

    @Override
    public String getFilePath() {
        return myDelegate.getFilePath();
    }

    @Override
    public String getURLPath() {
        return myDelegate.getURLPath();
    }

    @Override
    public String getUsername() {
        return myDelegate.getUsername();
    }

    @Override
    public String getPassword() {
        return myDelegate.getPassword();
    }

    @Override
    public String getLastError() {
        return myDelegate.getLastError();
    }

    @Override
    public void read() throws IOException, DocumentException {
        myDelegate.read();
    }

    @Override
    public void write() throws IOException {
        throw new IOException("You can't write a read-only document");
    }

    @Override
    public URI getURI() {
        return myDelegate.getURI();
    }

    @Override
    public Portfolio getPortfolio() {
        return null;
    }

    @Override
    public boolean isLocal() {
        return myDelegate.isLocal();
    }

}
